Down to Earth Rock Phosphate 0-3-0 Fertilizer - 5 lb
- Soft rock phosphate
- Long-lasting phosphate and soil-building calcium
- Should be mixed into soil
Soft rock phosphate, or colloidal phosphate, is a natural, untreated source of long-lasting phosphate and soil-building calcium. Phosphate will remain available across a wide pH range. For best availability, soft rock phosphate should be mixed into soil or compost prior to planting.
- Capacity: 5 lb
- Certification: CDFA, OMRI